27575381 has 2 divisors, whose sum is σ = 27575382. Its totient is φ = 27575380.

The previous prime is 27575371. The next prime is 27575393. The reversal of 27575381 is 18357572.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27394756 + 180625 = 5234^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 27575381 - 2¹⁴ = 27558997 is a prime.

It is a super-2 number, since 2×27575381² = 1520803274590322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27575351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13787690 + 13787691.

It is an arithmetic number, because the mean of its divisors is an integer number (13787691).

Almost surely, 2^27575381 is an apocalyptic number.

It is an amenable number.

27575381 is a deficient number, since it is larger than the sum of its proper divisors (1).

27575381 is an equidigital number, since it uses as much as digits as its factorization.

27575381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 38.

The square root of 27575381 is about 5251.2266186102. The cubic root of 27575381 is about 302.1160796696.

The spelling of 27575381 in words is "twenty-seven million, five hundred seventy-five thousand, three hundred eighty-one".